its.apply: massits time series functions
In rolfsimoes/massits: Massive Satellite Image Time Series

Applies a function to some massits tibble's fields

1	its.apply(m, fun, bands_params = NULL, bands = its.bands())

`m`	A valid massits tibble
`fun`	A valid function with one argument to be applied on each attribute (its first argument).
`bands_params`	An optional parameter to be passed as `fun` second argument. If informed, it must have `1` or the same number of bands. (Default `NULL`)
`bands`	A string vector indicating those fields (bands) to which function `fun` will be applied. All non selected fields will remain unchanged (Default `its.bands()`).